80-EN79-EN
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12Troubleshooting
In addition to the CODE No. on the remote controller of an indoor unit, you can diagnose failure type of an outdoor
unit by checking the 7-segment display on the interface P.C. board.
Use the function for various checks.
Set every DIP switch to OFF after checking.
7-Segment display and check code
Rotary switch setting value
Indication LED
D600
AB
D601 D602 D603 D604
SW01 SW02 SW03
1 1 1 Outdoor unit check code
A
Outdoor unit number
(U
1 to U3)
B Check code display*
* If a check code has an auxiliary code, the display indicates the check code for three seconds and the auxiliary
code for one second alternately.
Check code (indicated on the 7-segment display on the outdoor unit)
Indicated when SW01 = [1], SW02 = [1], and SW03 = [1].
Check code
Check code nameIndication on 7-segment display on the outdoor unit
Auxiliary code
E06 Number of indoor units which received normally Decrease of number of indoor units
E07 — Indoor/outdoor communication circuit error
E08 Duplicated indoor addresses Duplication of indoor addresses.
E12
01: Communication between indoor and outdoor units
02: Communication between outdoor units
Automatic addressing start error
E15 — No indoor unit during automatic addressing
E16
00: Capacity over
01~: Number of connected units
Capacity over / number of connected indoor units
E19
00: Header is nothing
02: 2 or more header units
Number of header outdoor unit error
E20
01: Other line outdoor connected
02: Other line indoor connected
Other lines connected during automatic addressing
E23 —
E25 — Duplicated follower outdoor address set up
E26 Number of outdoor units which received normally Decrease of connected outdoor units
E28 Detected outdoor unit No. Follower outdoor unit error
E31 IPDU quantity information
(*1)
IPDU communication error
E31 80 Communication error between MCU and sub MCU
F04 — TD1 sensor error
F05 — TD2 sensor error
F06
01: TE1 sensor
02: TE2 sensor
TE1 sensor error
TE2 sensor error
F07 01: TL1 sensor TL1 sensor error
F08 — TO sensor error
Check code
Check code nameIndication on 7-segment display on the outdoor unit
Auxiliary code
F12
01: TS1 sensor
02: TS2 sensor
TS1 or TS2 sensor error
F13
01: Compressor 1
02: Compressor 2
TH (Heat sink) sensor error
F15 — Outdoor temp. sensor miswiring (TE1, TL1)
F16 — Outdoor pressure sensor miswiring (Pd, Ps)
F23 — Ps sensor error
F24 — Pd sensor error
F31 — Outdoor EEPROM error
H01
01: Compressor 1
02: Compressor 2
Compressor breaking down
H02
01: Compressor 1
02: Compressor 2
Compressor error (Locked)
H03
01: Compressor 1
02: Compressor 2
Current detection circuit error
H05 — TD1 sensor miswiring
H06 — Low pressure protective operation
H07 Detected outdoor unit No.
Oil level down detection
(Indicated only on the header outdoor unit)
H08
01: TK1 sensor error
02: TK2 sensor error
04: TK4 sensor error
05: TK5 sensor error
Temperature sensor error for oil level
H15 — TD2 sensor miswiring
H16
01: TK1 oil circuit error
02: TK2 oil circuit error
04: TK4 oil circuit error
05: TK5 oil circuit error
Oil level detector circuit error
J10 Flow selector units overflow error
L02
L04 — Outdoor
L06 Number of prior indoor units Duplication of indoor units with priority
L08 — Indoor unit group/address unset
L10 — Outdoor unit capacity unset.
L12 01: Flow selector unit(s) installation error Flow selector unit(s) system error
L17
— Inconsistent models of outdoor units
L18 Detected indoor unit address Flow selector unit error
L23 01: Clean Converter setting error Setting error
L24
flow selector unit address
Flow selector unit(s) setting error
L28 — Outdoor connected quantity over
L29 IPDU number information
(*1)
IPDU quantity error
L30 Detected indoor unit address External interlock of indoor unit
L31 —
Communication transmission error between outdoor units
Detected indoor unit address
—
01: Duplication of
02: Indoor unit(s) operation mode priority setting
Compressor IPDU errors
Outdoor units model disagreement error
system address duplication
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